Never create an app list for an incognito profile.

chrome/browser/ui/app_list/app_list_service_mac.mm

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/app_list/app_list_service_mac.h"
 
 #include <ApplicationServices/ApplicationServices.h>
 #import <Cocoa/Cocoa.h>
 
 #include "base/bind.h"
@@ skipping 366 matching lines @@
   // launches will always have --silent-launch.
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kShowAppList))
     ShowWindowNearDock();
 }
 
 Profile* AppListServiceMac::GetCurrentAppListProfile() {
   return profile_;
 }
 
 void AppListServiceMac::ShowForProfile(Profile* requested_profile) {
-  InvalidatePendingProfileLoads();
-
-  if (requested_profile == profile_) {
-    ShowWindowNearDock();
-    return;
-  }
-
-  SetProfilePath(requested_profile->GetPath());
   CreateForProfile(requested_profile);
   ShowWindowNearDock();
 }
 
 void AppListServiceMac::DismissAppList() {
   if (!IsAppListVisible())
     return;
 
   // If the app list is currently the main window, it will activate the next
   // Chrome window when dismissed. But if a different application was active
@@ skipping 27 matching lines @@
   AppController* controller = [NSApp delegate];
   [controller initAppShimMenuController];
 }
 
 void AppListServiceMac::CreateShortcut() {
   CreateAppListShim(GetProfilePath(
       g_browser_process->profile_manager()->user_data_dir()));
 }
 
 void AppListServiceMac::CreateForProfile(Profile* requested_profile) {
-  if (profile_ == requested_profile)
+  DCHECK(requested_profile);
+  InvalidatePendingProfileLoads();
+  if (profile_ && requested_profile->IsSameProfile(profile_))
     return;
 
-  profile_ = requested_profile;
+  profile_ = requested_profile->GetOriginalProfile();
+  SetProfilePath(profile_->GetPath());
 
   if (!window_controller_)
     window_controller_.reset([[AppListWindowController alloc] init]);
 
   [[window_controller_ appListViewController] setDelegate:nil];
   [[window_controller_ appListViewController]
       setDelegate:GetViewDelegate(profile_)];
 }
 
 void AppListServiceMac::DestroyAppList() {
@@ skipping 145 matching lines @@
 
 - (void)animationDidEnd:(NSAnimation*)animation {
   content::BrowserThread::PostTask(
       content::BrowserThread::UI,
       FROM_HERE,
       base::Bind(&AppListServiceMac::WindowAnimationDidEnd,
                  base::Unretained(AppListServiceMac::GetInstance())));
 }
 
 @end